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107
2. Add all the converted numbers.
3. Divide the total by 128 and note the remain-
der.
4. Subtract the remainder from 128. The result
is the checksum.
5. Convert the decimal checksum back to
hexadecimal format using the above chart.
Troubleshooting
The VL70-m is a very versatile tone generator
with many features and functions that affect
operation. In many cases, what appears to be a
fault with the VL70-m can actually be traced to an
improperly set parameter or something as simple as
a bad connection.
Here’s how to determine if the problem is internal
(e.g. parameter settings) or external (e.g. connec-
tions, amplifier, etc.):
● Listen via headphones. Plug a pair of head-
phones into the VL70-m and play. If the
headphone sound is OK, then the problem is
most likely in the amplifier or mixer you are
using, or the audio connection cables.
● Try adjusting all operational controllers —
modulation wheels, foot controllers, etc. In
some cases extreme controller settings can
cause unexpected sound or pitch … or even no
sound at all.
● Try selecting different voices. If the problem
occurs only on one voice then the voice param-
eters are most likely at fault. If the problem
occurs on all voices then a utility parameter
should be suspected.
The following are some common problems and
probable causes:
Symptom
• No power.
Possible Causes
• Is the AC adaptor properly connected to both
the VL70-m and an AC wall outlet (page 15)?
• If the AC apaptor is connected to a switched
AC outlet on another piece of equipment (an
amplifier, for example) is that devide switched
on?
HEX DEC
40 64
41 65
42 66
43 67
44 68
45 69
46 70
47 71
48 72
49 73
4A 74
4B 75
4C 76
4D 77
4E 78
4F 79
HEX DEC
50 80
51 81
52 82
53 83
54 84
55 85
56 86
57 87
58 88
59 89
5A 90
5B 91
5C 92
5D 93
5E 94
5F 95
HEX DEC
60 96
61 97
62 98
63 99
64 100
65 101
66 102
67 103
68 104
69 105
6A 106
6B 107
6C 108
6D 109
6E 110
6F 111
HEX DEC
70 112
71 113
72 114
73 115
74 116
75 117
76 118
77 119
78 120
79 121
7A 122
7B 123
7C 124
7D 125
7E 126
7F 127
Appendix